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May 20, 2015

May 20, 2015. Estimation of Destination Choice Models using Small Sample Sizes and Cellular Phone Data. Roberto O. Miquel Chaitanya Paleti Tae- Gyu Kim, Ph.D. Acknowledgements. North Carolina Department of Transportation Wilmington MPO. Introduction.

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May 20, 2015

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  1. May 20, 2015 Estimation of Destination Choice Models using Small Sample Sizes and Cellular Phone Data Roberto O. Miquel Chaitanya Paleti Tae-Gyu Kim, Ph.D.

  2. Acknowledgements North Carolina Department of Transportation Wilmington MPO

  3. Introduction Travel Demand Model for Wilmington, NC Total Population ~ 260,000 Total Area ~ 405 Sq mi Visitor Attractions: Downtown and Beaches

  4. Introduction … This enhanced model features: Extended area Refined TAZ system Visitor model Time-of-day components Destination choice model No recent travel survey data North Carolina NHTS Add-on – Small sample size Cellular Phone Data for Origin-Destination

  5. Cellular Phone Data Identify study area origin-destination flows by trip purpose Identify visitor trip movements in study area Identify internal-external trip movements Identify external-external trip movements Calibrate Wilmington’s trip distribution models.

  6. Cellular Phone Data Sample • Visitors and residents • Daily trip tables • Directional purposes One month of data (July) 475,506 unique devices 38,761 residents 5.1% sample rate

  7. Resident Origin-Destination Flows OW (Trips > 50) HW (Trips > 50)

  8. Visitor Origin-Destination Flows OO (Trips > 50)

  9. Destination Choice Model 205 records Destination choice for trip distribution Model estimated using NHTS data for trip ends – no recent survey data LEHD data for household earnings Household characteristics and generalized cost skims from the MPO model NHTS Trips records – few Home Based Trips

  10. Destination Choice Model: Methodology Exogenous variables and Interaction variables tying in different trip purposes 4 different trip purposes: Home Based Work Trips ( HBW) Home Based Shopping Trips (HBS) Home Based Other (HBO) Non Home Based Trips (NHB) Single equation incorporating different trip purposes 11 destination alternatives (out of 601 TAZs) – 10 randomly selected and actual destination choice – for model estimation

  11. Destination Choice Model: Methodology … Labi and Sinha, 2011 Generalized cost=Time + Vehicle Operating Cost(VOC) + Toll Price Destination choice additionally accounts for: Employment Income Earnings Children Iterative technique - model estimation Results validated using trip tables from cellular phone data

  12. Destination Choice Model Results

  13. Model Validation

  14. Model Validation

  15. Model Validation

  16. Summary and Conclusions Use of cellular phone data set helps to establish confidence in estimating a model using a small sample Very short trips revealed in the cellular phone data set seem consistent with behavior estimated from the NHTS Estimating destination choice models from small samples is not ideal, but is possible

  17. Thank You Roberto Miquel, AICP CDM Smith Raleigh, NC miquelro@cdmsmith.com Tae-Gyu Kim, Ph.D. NCDOT Raleigh, NC tae-gyukim@ncdot.gov Chaitanya Paleti CDM Smith Raleigh, NC paletisivasaic@cdmsmith.com

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